S
M
T
W
T
F
S
26
99°
71°
27
100°
70°
28
99°
66°
29
100°
66°
30
102°
67°
31
105°
63°
1
109°
77°
2
106°
79°
3
106°
74°
4
107°
73°
5
108°
76°
6
107°
77°
7
106°
77°
8
107°
72°
9
104°
71°
10
102°
71°
11
101°
69°
12
99°
70°
13
99°
67°
14
98°
65°
15
94°
68°
16
96°
68°
17
94°
66°
18
96°
68°
19
96°
68°
20
97°
67°
21
98°
67°
22
99°
66°
23
99°
68°
24
98°
67°
25
99°
67°
26
99°
66°
27
98°
67°
28
97°
66°
29
98°
67°
30
97°
66°
31
97°
66°
1
95°
65°
2
97°
65°
3
95°
64°
4
94°
65°
5
90°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lancaster
Lancaster's August 2026 forecast shows daily high temperatures ranging from 90° to 109°, with overnight lows between 64° and 79°. The average high for August is 100° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Lancaster. See also: September | October | November.
